How do you reset storage definition in Atelier?

I'm just getting started with Atelier and HealthShare. I created a persistent class, then realized I didn't want it. There is information in help about resetting storage definitions, where you use 'delete' in Studio. I tried that in Atelier. It deleted the class but not the storage. I can't delete the table directly because I didn't set it to allow DDL. This was done in a development environment and there is no data in the table. So, two questions: